Universität zu Köln

Herren, Christian, Beckmann, Agnes, Meyer, Sabine, Pishnamaz, Miguel, Mundt, Marion, Sobottke, Rolf, Prescher, Andreas, Stoffel, Marcus, Markert, Bernd ORCID: 0000-0001-7893-6229, Kobbe, Philipp, Pape, Hans-Christoph, Eysel, Peer and Siewe, Jan (2017). Biomechanical testing of a PEEK-based dynamic instrumentation device in a lumbar spine model. Clin. Biomech., 44. S. 67 - 75. OXFORD: ELSEVIER SCI LTD. ISSN 1879-1271

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Abstract

Background: The purpose of this study was to investigate the range-of-motion after posterior polyetheretherketone-based rod stabilisation combined with a dynamic silicone hinge in order to compare it with titanium rigid stabilisation. Methods: Five human cadaveric lumbar spines with four vertebra each (L2 to L5) were tested in a temperature adjustable spine-testing set-up in four trials: (1) native measurement; (2) kinematics after rigid monosegmental titanium rod instrumentation with anterior intervertebral bracing of the segment L4/5; (3) kinematics after hybrid posterior polyetheretherketone rod instrumentation combined with a silicone hinge within the adjacent level (L3/4) and (4) kinematics after additional decompression with laminectomy of L4 and bilateral resection of the inferior articular processes (L3). During all steps, the specimens were loaded quasi-statically with 1 degrees/s with pure moment up to 7.5 Nm in flexion/extension, lateral bending and axial rotation. Findings: In comparison to the native cadaveric spine, both the titanium device and polyetheretherketone-based device reduce the range-of-motion within the level L4/5 significantly (flexion/extension: reduction of 77%, p < 0.001; lateral bending: reduction of 62%, p < 0.001; axial rotation: reduction of 71%, p < 0.001). There was a clear stabilisation effect after hybrid-instrumentation within the level L3/4, especially in flexion/extension (64%, p < 0.001) and lateral bending (62%, p < 0.001) but without any effect on the axial rotation. Any temperature dependency has not been observed. Interpretation: Surprisingly, the hybrid device compensates for laminectomy L4 and destabilising procedure within the level L3/4 in comparison to other implants. Further studies must be performed to show its effectiveness regarding the adjacent segment instability. (C) 2017 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Herren, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Beckmann, Agnes UNSPECIFIED UNSPECIFIED UNSPECIFIED Meyer, Sabine UNSPECIFIED UNSPECIFIED UNSPECIFIED Pishnamaz, Miguel UNSPECIFIED UNSPECIFIED UNSPECIFIED Mundt, Marion UNSPECIFIED UNSPECIFIED UNSPECIFIED Sobottke, Rolf UNSPECIFIED UNSPECIFIED UNSPECIFIED Prescher, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Stoffel, Marcus UNSPECIFIED UNSPECIFIED UNSPECIFIED Markert, Bernd UNSPECIFIED orcid.org/0000-0001-7893-6229 UNSPECIFIED Kobbe, Philipp UNSPECIFIED UNSPECIFIED UNSPECIFIED Pape, Hans-Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Eysel, Peer UNSPECIFIED UNSPECIFIED UNSPECIFIED Siewe, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-232239
DOI:	10.1016/j.clinbiomech.2017.03.009
Journal or Publication Title:	Clin. Biomech.
Volume:	44
Page Range:	S. 67 - 75
Date:	2017
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1879-1271
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language IN-VITRO; DISC DEGENERATION; STABILIZATION; FUSION; MOTION; SYSTEM; RANGE Multiple languages Engineering, Biomedical; Orthopedics; Sport Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23223